1231430051 has 16 divisors (see below), whose sum is σ = 1313760000. Its totient is φ = 1151761248.

The previous prime is 1231430047. The next prime is 1231430063. The reversal of 1231430051 is 1500341321.

It is not a de Polignac number, because 1231430051 - 2² = 1231430047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231430951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211325 + ... + 217073.

It is an arithmetic number, because the mean of its divisors is an integer number (82110000).

Almost surely, 2^1231430051 is an apocalyptic number.

1231430051 is a deficient number, since it is larger than the sum of its proper divisors (82329949).

1231430051 is a wasteful number, since it uses less digits than its factorization.

1231430051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5978.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1231430051 is about 35091.7376457764. The cubic root of 1231430051 is about 1071.8563434674.

Adding to 1231430051 its reverse (1500341321), we get a palindrome (2731771372).

The spelling of 1231430051 in words is "one billion, two hundred thirty-one million, four hundred thirty thousand, fifty-one".